Thanks for the info Anthonius and great pictures of your old mod. Not sure if you saw but the model you posted which you said had vertices assigned to 3 joints wasn't actually the case. When loaded back as a mesh it actually has the standard 2 joint assignment which is what we thought given that the mesh can only hold 2 weight values per vertex and only uses 2 quad values to sore the joint number. I wasn't sure if it was somehow defaulting due to not adding up to a combined 1.00 but even that wasn't the case as all that happens was when you load back to MTW2, one joint was dropped and its weight was added to one of the remaining joints.